OP-II-3

PP-I-24ORGANOCYCLOSILOXANE POLYMERIZATION ACTIVATED BYAROMATIC ISOCYANATES BY A MACROINITIATORGumerov А.М., Davletbaeva I.М., Galjautdinova A.F., Ahmetshina A.I.Kazan State Technological University, 420015, K. Marks Str., 68, Kazan, Russiagumerov_a@mail.ru, davletbaeva09@mail.ruCopolymers based on octamethylcyclotetrasiloxane (D 4 ), aromatic isocyanate bya macroiniator, which is polyether containing end potassium- alcoholate groups andhydroxyl groups (PPG-K), were synthesized. Both bifunctional 2,4-toluenediisocyanate (TDI) and monofunctional phenyl isocyanate (PIC) were used asaromatic isocyanates.The mechanism of organocyclosiloxane opening on a macroinitiator activated byaromatic isocyanates was investigated, the mathematical modeling of reactionkinetics being used. Polymers obtained in toluene by the interaction of PPG-K, PICand D 4 were separated by evaporation, then they were analyzed by means of infaredspectroscopy. In infared spectra, when there is slight excess of PIC, the bands in thearea of 1651 cm –1 , corresponding to the fluctuating of C=N bond, and the arm in thearea of 1210 cm –1 , conditioned by fluctuating of С-О-С bond (included intopolyisocyanate group having acetal characteristics (О-polyisocyanates) areobserved. If mole fraction of PIC is further increased, phenyltriisocyanurate crystalsare separated out after a while when the interaction product is dissolved.To study the regularities of polymer (obtained by D 4 polymerization activated byaromatic isocyanates) molecular characteristics changing the dependences ofintrinsic viscosity on polymer concentration were measured. Monofunctionalphenylisocyanate was used as aromatic isocyanurate. The model studies were alsoperformed by a macroinitiator when either PIC or D 4 was not incorporated into thereaction system. It turned out that intrinsic viscosity of polymers synthesized on thebase of PPG-K, PIC and D 4 exceeds substantially the intrinsic viscosity obtained notonly for model systems but obtained for commercial siloxane oligomers as well. It isdetermined that the microphase separation proceeds in polymer, polyether, siloxaneand triisocyanurate components taking part in it.264